Specifications

Administration Guide
326 VMware, Inc.
connections.!ESX!Server!can!detect!only!that!the!link!has!been!physically!restored,!
but!not!that!the!port!is!blocked!by!the!Spanning‐Tree!check.
! Portfast!Mode!–!Use!to!reduce!errors!caused!by!Spanning‐Tree!checks.!If!you!
cannot!disable!the!Spanning‐Tree!Protocol!for!an!external!switch,!configure!the!
ports!connected!to!the!server!to!use!Portfast!mode.!This!reduces!Spanning‐Tree!
delays,!resulting!in!fewer!false!indications!of!link!failures.
Troubleshooting
If,!while!booting!your!virtual!machine,!you!see!an!error!message!stating!that!the!
Ethernet!device!cannot!be!detected,!check!the!following:
! Network!Connections!pane!–!Be!sure!that!the!correct!physical!adapters!are!
assigned!to!a!bond
! VM!Configuration!page!–!Be!sure!the!correct!bond!is!selected!for!the!specified!
Ethernet!device!and!that!the!selected!vmnic!is!not!already!assigned!to!a!bond!
device!or!already!in!use.
Make!the!appropriate!change(s),!and!reboot!your!virtual!machine!to!determine!
whether!the!error!message!persists.